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Re: st: Some basic help on programming


From   Friedrich Huebler <fhuebler@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Some basic help on programming
Date   Wed, 11 Apr 2012 07:20:35 -0400

Prakash,

I am going back to your first message, in which you had this code:

use "level3_list.dta", clear
keep if item_code==309
ren item_code item_code_manu
ren asicc_code asicc_code_manu
ren unit_quantity unit_quantity_manu
ren quantity quantity_manu
ren value value_manu
sort common_id
save "item309.dta",replace

You can do the same with the commands below. The only difference is
that variable names will have the code number instead of "manu",
"trade", etc.

use "level3_list.dta", clear
local vars "item_code asicc_code unit_quantity quantity value"
levelsof item_code, local(items)
foreach i of local items {
  preserve
  keep if item_code==`i'
  foreach var of varlist `vars' {
    ren `var' `var'_`i'
  }
  sort common_id
  save "item`i'.dta", replace
  restore
}

Friedrich

On Tue, Apr 10, 2012 at 11:06 PM, Prakash Singh <prakashbhu@gmail.com> wrote:
> Thanks Maarten and Samuels
>
> I am providing here "tba" of one of the lavel data. Before that I
> think I should explain about the dataset structure. this is firm level
> data set. for convenience it is divided in levels. the present data
> set contains 10 levels (for 82789 firm). in some of the level as in
> the case of operating expences, asset, workers level data set needs to
> be further divied into item to get information about female workers
> (full time part time and temp) male worker (full time part time and
> temp)  but there is no distinct vatiable for these.
>
> we have single variable "value" in which represent different kind of
> workers with item number (for example item number 301 represents
> female full time worker, 302 female part time and son. now to get the
> information at sub aggregate level var value has to be created at item
> basis where each item repesent some particual of expences.
>
>
> Item    Freq.
> 301     50,831
> 302     35,895
> 303     23,953
> 304     15,343
> 305     9,210
> 306     20,410
> 309     51,994
> 311     1,255
> 312     2,702
> 313     497
> 319     4,050
> Total   216,140
>
> If you see the total it not equal to 82789. item 301 is female full
> time worker and 50,831 represents the number of firms for which we
> have information for female full time worker. thus in order to get the
> value of total worker (male and female) we need to break the data at
> item level and merge.
>
> I tried with collapse but values are differing with keep if method.
>
> Hope this will make my query clear.
>
> Prakash

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